2011
DOI: 10.1007/s11085-011-9237-7
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Increasing the Upper Temperature Oxidation Limit of Alumina Forming Austenitic Stainless Steels in Air with Water Vapor

Abstract: A family of alumina-forming austenitic (AFA) stainless steels is under development for use in aggressive oxidizing conditions from *600-900°C. These alloys exhibit promising mechanical properties but oxidation resistance in air with water vapor environments is currently limited to *800°C due to a transition from external protective alumina scale formation to internal oxidation of aluminum with increasing temperature. The oxidation behavior of a series of AFA alloys was systematically studied as a function of C… Show more

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Cited by 92 publications
(57 citation statements)
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“…For the alumina-forming Febase alloys, FeCrAlY behaved very well except after the exposure at 550°C (which will be addressed in a future paper [33]). While ferritic FeCrAlY has little creep strength at 650°C, the AFA alloys were designed to have high creep strength due to their nanocarbide precipitates [29,30] as well as good oxidation resistance in air and wet air by the formation of an alumina scale [28,48]. A consequence of this balancing of oxidation resistance and mechanical properties is that austenitic AFA is not as ''strong'' an aluminaformer as ferritic FeCrAlY type alloys, perhaps due to slower Al diffusion in austenite.…”
Section: Effect Of the Alloy Compositionmentioning
confidence: 99%
“…For the alumina-forming Febase alloys, FeCrAlY behaved very well except after the exposure at 550°C (which will be addressed in a future paper [33]). While ferritic FeCrAlY has little creep strength at 650°C, the AFA alloys were designed to have high creep strength due to their nanocarbide precipitates [29,30] as well as good oxidation resistance in air and wet air by the formation of an alumina scale [28,48]. A consequence of this balancing of oxidation resistance and mechanical properties is that austenitic AFA is not as ''strong'' an aluminaformer as ferritic FeCrAlY type alloys, perhaps due to slower Al diffusion in austenite.…”
Section: Effect Of the Alloy Compositionmentioning
confidence: 99%
“…Austenitic stainless steels with relatively high Cr and Ni, on the other hand, can be used in higher temperatures due to their combination of relatively good creep strength and high temperature oxidation resistance [9]. Extensive studies [10][11][12][13][14][15][16][17][18][19] in recent years on the oxidation of austenitic stainless steels (e.g.…”
Section: Introductionmentioning
confidence: 99%
“…Apart from potential strengthen effect, Laves phase is also benefit for the precipitation of B2-NiAl phase, which is considered not only an important strengthen phase for Fe-Ni-Cr-Al alloy [9,12], but also important to the oxidation resistance of the steels. As NiAl can continuous supply Al for the formation of dense continuous alumina scale, namely provide a reservoir effect [15,[28][29][30][31]. For better understanding the performance of alumina forming austenitic stainless steels, it is necessary to pay more attention on the annealing behavior of the precipitates and investigate their strengthen effects.…”
Section: Microstructure Evolution After Corrosion Testmentioning
confidence: 99%